summaryrefslogtreecommitdiff
path: root/drivers/s390
diff options
context:
space:
mode:
authorDan Williams <dan.j.williams@intel.com>2017-06-27 13:06:22 -0700
committerDan Williams <dan.j.williams@intel.com>2017-06-27 16:44:27 -0700
commit5d61e43b3975c0582003329d9de9d5e85abf5d33 (patch)
tree259546b1a8fd2b8cf50d40698edfaeebdb241e00 /drivers/s390
parentc9e582aa689f5418ca30e1e7a975039772c3a757 (diff)
dax: remove default copy_from_iter fallback
Require all dax-drivers to register a ->copy_from_iter() operation so that it is clear which dax_operations are optional and which must be implemented for filesystem-dax to operate. Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> Suggested-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/block/dcssblk.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 36e5280af3e4..88fa7b3f7a9d 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -18,6 +18,7 @@
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/pfn_t.h>
+#include <linux/uio.h>
#include <linux/dax.h>
#include <asm/extmem.h>
#include <asm/io.h>
@@ -43,8 +44,15 @@ static const struct block_device_operations dcssblk_devops = {
.release = dcssblk_release,
};
+static size_t dcssblk_dax_copy_from_iter(struct dax_device *dax_dev,
+ pgoff_t pgoff, void *addr, size_t bytes, struct iov_iter *i)
+{
+ return copy_from_iter(addr, bytes, i);
+}
+
static const struct dax_operations dcssblk_dax_ops = {
.direct_access = dcssblk_dax_direct_access,
+ .copy_from_iter = dcssblk_dax_copy_from_iter,
};
struct dcssblk_dev_info {